Insufflator digital gas flow system

摘要

A pressure controlling system for an insufflator includes a plurality of parallel connected, solenoid controlled valves. Each valve has in series therewith a gas flow limiter with the limiters arranged in digital succession. The valves are in parallel with one another and in series with the gas flow line so that solenoid opening of one or more of the valves controls gas flow in an on-off fashion with gas flow continuing through the respective flow limiting means to determine total flow rate in a digital manner.